Smart building fire protection system based on Huawei LiteOS

Introduction: This project is a smart building fire protection system based on Huawei LiteOS. The main technologies include sensors, LiteOS, NB-IoT, 2G, Huawei Cloud, etc. Developed based on the Bear School smart smoke sensor case.

Schematic PCB

esp8266wifi attacker

Introduction: Well, the mechanical keyboard shaft body is very simple to weld.
It uses the ch340 serial port module
26650 to power the battery. Do not plug in microusb when the battery is powered.
It does not support battery charging.

Schematic PCB

MA5671A/G-010S-A SFP flashing board

Introduction: MA5671A/G-010S-A SFP flashing board, can be used for soldering pins

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MA5671A/G-010S-A SFP debug version

Introduction: MA5671A/G-010S-A SFP debug version

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Meow Clock

Introduction: Small and cute desktop clock with strong scalability and low price, dream flying esp8266 oled

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DJI changes to analog, rx5808 receiver

Introduction: The module is based on the "Drink This Bowl of Poisonous Chicken Soup" by the up owner of station b. The principle and firmware are all based on this up. You can search for specific tutorials by yourself. I just drew a pcb.

Schematic PCB

Discrete power stage low cost high power class D amplifier

Introduction: Dual TL494 BD/1SPW modulation scheme, differential input and feedback, no power-on shock, matched with EG2132 (cheap) driver, the power stage is a full-bridge design, and the power utilization rate is higher

Schematic PCB

2021 Question E - Digital-Analog Signal Hybrid Transmission Transceiver + All Guessed Correctly

Introduction: 2021 National Undergraduate Electronic Design Competition Topic E [Digital-Analog Signal Hybrid Transmission Transceiver] National Second Prize Work

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ESP32-S3-12K core board

Introduction: ESP32-S3 core board

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2021 D Topic - Internet-based camera measurement system + yyds team

Introduction: This design is based on the principle of image recognition and designs an Internet-based camera measurement system. The system uses Raspberry Pi as the core processing terminal, and realizes a star-shaped interconnection network through a 100M Ethernet switch and two camera nodes to complete the measurement and real-time display of the swing angle and length of the fishing line and laser pen combination.

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ESP32 game console

Introduction: esplay upgraded version with small TV function and alarm clock function

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Mechanical leg design based on HI3861

Introduction: A mechanical leg structure controlled by Hi3861, two-way servos, with OLED display, and powered by 18650 lithium battery.

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copper price pointer table

Introduction: It can only display the copper price of the day, which is useless. . . . You can change the program and dial to display other data.

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Ink Screen 1.0

Introduction: 2.14-inch ink screen

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433/315M remote control (external antenna)

Introduction: 433/315M remote control,

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【Internet of Things】Smart WiFi switch-OpenHarmony

Introduction: Using Hi3861 module to develop IoT switches

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esp8266 three-way relay

Introduction: ESP8266 three-way relay switch supports LAN remote control and can be mapped to the public network by itself. Not dependent on third-party platforms

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ESP12F-Servo control switch light

Introduction: Use ESP12F to control the servo to turn lights on and off, and use OLED to display time and weather information.

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USB wireless network card-RTL8188 module adapter board (adapted to U disk shell) New

Introduction: You can attach the RTL8188 module to this adapter board and use it with a U disk shell to make a USB wireless network card that continues to shine and heat.

Schematic PCB

BOBO Mini WiFi Killer

Introduction: This project is an improvement based on the project of https://oshwhub.com/guo-0512. It adds a battery protection circuit and a battery charging circuit, and also adjusts the appearance.

Schematic PCB